Plow-trip



c. 1. z`. F'ANBEHG.

PLOW TRIP.

APPLICATION FILED AUG. 27| |919.

Patented Feb. 17,

` UNITED STATES PATENT oEEroE.

cLEMoNs J. zEBULoN FANBEBG, or KEBKHOVEN, MINNESOTA.

PLOW-TRIP.

Application med August a7, 1919. serial Nb. 320,106.

To all 'whom 't may concern.'

Be it known that I, CLEMoNs J. ZEBULON FANBERG, a citizen of the United States, residings at Kerkhoven, in the county of Swift and tate of lidinnesota, have invented certain new and useful Improvements in Plow- Trips; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.-

My invention relates to improvements in plows, and has for its object to provide a pressure-released trip set to release a plow when the pull thereon is increased above a predeterminedamount due to striking a stone or other obstruction and thereby rpermit the plow to move out of working position and pass over the obstruction to avoid breakage or other damage and, when out of working position, said plow may be automatically reset.

VTo the above end, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings Figure 1 is a fragmentary land side elevation of a plow having the invention incorporated therein, with some parts. shown lin d-iferentl` positions by means of broken lines; an

Fig. 2 is a fragmentary plan view.

The numeral 3 indicates a plow rigidly secured to a relatively short primary beam 4: intermediately pivoted at 5 to the rearaend of a secondary beam 6 which, as shown, comprises a pair of laterally spaced members between which the free end of the primary beam projects. An upwardly projecting lock lever 7 extends between the members of the secondary beam 6 just forward of the primary beam and is fulcrumed thereto at 8. Formed in the rear end of the lock lever 7, at its fulcrum 8, is a lock notch 9 having on its upper side a tripping surface 10, and on its lower side a tripping surface 11. This lock notch 9 is adapted to receive the free end of the primary beam 1 to normally lock said primary beam to the secondary beam 6 agamst pivotal movement and thereby hold the plow working position.

Specification of Letters Patent. Patented Feb,

l Located between the members of the secondary beam 6 is a rocker 12 mounted at its rear end on a transverse pivot pin 13 anchored 1n the members of said secondary beam. The rocker 12 is connected to the lock lever 7 'by a pair of bars 14:, one end of which is pivoted to the free or upper end of said rocker, and the other -nd of which 1s pivoted to theifree or upper end of the lock lever 7. When the plow 3 is 1n working position, the lower edges of the bars 14 engage the pivot pin 13, for the rocker 12, as a stop and thereby limit the forward movement of the upper end of the lock lever 7. ln this' position of the lock lever is', the primary beam 4 engages the tripping surface 1w as a' positive stop to hold the point of the plow 3 against upward movement in respect to the secondary beam 6.

The prongs of a U-shaped link 15 embrace the rocker 12 from the rear edge thereofl and are pivotally connected thereto at 16. One end of a coiled spring 17 is attached to the transverse portion of the link 15, and the other end thereof is adjuStaJbly anchored by a turn buckle 18 tothe secondary beam 6 just forward of the lock lever 7. 1t is important t-o note that thelink 15 when the plow 3 is in working position, is below a dead center, as shown by full lines in Fig. 1, so that the spring 17 yieldingly holds the lever 7 set. Obviously, by manipulating the turn' buckle 18, the tension of the sprin 17 may be varied at will. lt will also is noted that when the plow 3 is tripped out of working position, as'shown b broken. lines in Fig. 1, the pivotal connectlon 16 for the link 15 ais n tgl; oltlher slildehof the de?? cener anv ere,trou te rin ,yieingly holds the locgk levers? inga released position. To permit this movement of the pivot 17 from one side of a dead center to the other, the link 15 is downwardly bent to aord clearance for the pivot pin 13. When the lock lever 7 is in a released position, as shown by broken lines in Fig. 1, the bent intermediate portion of the link 15 engages the pivot pin 13 as a sto to limit the releasing movement of the ook lever 7.

ln case the pull on the plow 3 is increased, above the tension at which the spring 17 is set, due to the plow 3 striking a stone or other obstruction, said vpull will cause the primary beam t to turn on its fulcrum 5 and permit the point of the plow to move rearward and thereby pass the al.,

' This ivotal movement of the rimary beam sure to move the rocker 12 rearward and 4, acting on the tripping sur ace 11 with a cam action, will cause the lock lever 7 to move rearward, as indicated by broken lines in Fig. 1. This rearward movement of the lock lever 7, acting through the bars 14, will lift the rocker 12 against the tension of the 17 and move the same rearward. Elbrin this movement of the rocker 12, the pivota connection 16 of the links 15 will move upward from one side to the other of a dead center, and, after passing above the dead center, the spring 17 will exert a preshence the lock lever will be movedtherewith until stopped by the engagement of the link 15 with the pivot pin 13. The spring 17 will yieldingly hold the lock lever 7 in a released position until the plow is reset, as will now be described.

To reset the plow, the rear end of the secondary beam 6 may be lifted by any suitable means, and the weight of the plow, when lifted from the ground, will cause the plow to swing forward on its fulcrum 5 and thereby lift the free end of the primary beam 4 into engagement with the tripping surface 10 of the lock lever 7 ewith such force as to cause a forward movement of the lock lever 7. The initial forward movement of the lock lever 7, acting through the bars 14, will swing the rocker 12 forwardly and downwardly and thereby carry4 the pivot 16 below `the dead center, at which time the spring 17 will exert suficient force to cause the lock lever 7 to rengage the primary beam 4 and lock the same to the secondary beam against pivotal movement.

By reference to Fig. 1, it will be noted that there is an extra hole in the rocker for the pivot which connects the bars 14 thereto into which said pivot may be adjusted to change the set position of the locker lever 7 and thereby lower the point of the plow in respect to the secondary beam 6. It will also. be noted that there is an extra hole into which the pivot 16 may be adjusted.

In place of lifting the rear end of the secondary beam 6 to reset theI plow, said secondary beam may be moved backward to cause theprimary beam 4 to turn on its fulcrum 5 and thereby bring its free end into engagement with the tripping surface 10.

From the above description, it is evident that a plow, once tripped out of working position, may be automatically reset without causing the operator to move from his position. While in the drawings only a single plow is shown, it is of course understood that the invention is equally adapted for two-bottom plows.

1. The combination with a plow having primary and secondary beams, the former of which is vintermediately pivoted to the latter, of a rassure-released lock lever'ful crumed on t e secondary beam and provided with a lock notch having tripping surfaces on opposite sides thereof, said lock notch being arranged to receive the free end of the prlmary beam to hold the plow in working position, yielding means normally holding the lock lever in set and .released positions, one ofv said trip ing surfaces being arran d to be en ge by the primary beam w en the lock ever'is released to reset sa'rd lock lever and thereby cause the same to automatically rengage and lock the free end of the primary beam when the low is forced back to working position a er being tripped out of the same. 2. The combination with a plow having primary and secondary beams, the former of which is intermediately pivoted to the latter, of a lpressure-released lock lever fulcrumed on the secondary beam and provided with a lock notch having tripping surfaces on opposite sides thereof, said lock notch being arranged to receive the free end of the primary beam to hold the plow in working position, yielding means normally holding the lock lever in set and released positions, one of said tripping surfaces being arranged to be engaged by the primary beam when the lock lever .is released to reset said lock lever -and thereby cause the same to automatically rengage and lock the free end of the primary beam when the plow is plow is forced back to working position after being tripped out of the same, and a stop limiting the resetting movement of the lock lever.

3. The combination with a plow having primary and secondary beams, the former of which is intermediately pivoted to the latter, of a lock lever fulcrumed on the secondary beam and provided with a lock notch having tripping surfaces on opposite sides thereof, said lock notch being adapted tov receive the free end of the primary beam to hold the plow in working position, a rocker pivoted to the secondary beam, a bar pivotally connecting the lock lever to the rocker, and a sprin operative on the rocker to yieldingly ho d the lock lever in set and released positions, one of said tripping sur faces being arranged to 'be engaged by the primary beam to reset the lock lever and to receive the free end of the primary beam to hold the plow in working position a rocker pivoted to the secondary beam, a ar pivotally connecting the lock lever to the rocker, and a spring connecting the rocker to the secondary beam and arranged to be moved with the rocker from one slde to the other of the ulcrum for said rocker to yieldingly hold the lock lever in set and released positions, one of said tripping surfaces being arranged to be engaged by the primary beam to reset the lock lever and thereby cause the same to automatically reengage and lock the free end of the primary beam when the plow is forced back to working position after being trirmed out of the same.

5. The combination with a plow having primary and secondary beams, the former of which is intermediately pivoted to the latter, of a lock lever fulcrumed on the secondary beam and provided with a lock notch having tripping surfaces on opposite sides thereof, said lock notch being adapted to receive the ,free end of the primary beam to hold the plow in working position, a rocker pivoted to the secondary beam, a barvpivotally connecting the lock lever to the rocker, said bar being arranged to engage the fulcrum of the rocker as a stop to limit the resetting movement of the lock lever, and a spring connecting the rocker to the secondary beam and arranged to be moved with the rocker from one side to the other of the fulcrum for said rocker to yieldingly hold the lock lever in set and released positions, one of said tripping surfaces being arranged to be engaged by the primary beam to reset the lock lever and thereby cause the same to automatically reengage and lock the free end of the primary beam when the plow is forced back to working position after being tripped out of the same. 4 l

6. The combination with a plow having primary and secondary beams, the former of which is intermediately pivoted to the latter, of a lock lever fulcrumed on the secondary beam and provided with a lock notch having tripping surfaces on opposite sides thereof, said lock notch being adapted to receive the free end of the primary beam to hold the plow in working position, a rocker pivoted to the secondary beam, a bar pivotally connecting the lock lever to the rocker, a stop limiting the resetting movement of the lock lever, na bent link pivotally connected to the rocker, and a spring connecting the link to the secondary beam to yieldingly hold the lock lever in set and released positions, thepivotal connection between the link and rocker arranged to be moved from one side to the other of the fulcrum of said rocker to hold the lock lever in set and released positions, one of said tripping surfaces being arranged to be engaged by the primary beam to reset the lock lever and thereby cause the same to automatically reengage and lock the free end of the prlmary beam when the plow is forced back to working position after being tripped out of the same.

In testimony7 whereof I aiix my signature in presence of two witnesses.

CLEMONS J. ZEBULON FANBERG. Witnesses:

J. J. JOHNSON, H. N. ASHLEY. 

